4. Patient is affected by current neuropathic pain (pain provoked by a lesion of the peripheral nervous system). The diagnosis should be made by a neurologist/anaesthesiologist/pain specialist and based on history, clinical evaluation and/or laboratory findings (rule out systemic cause, e.g., hypothyroidism, rheumatoid arthritis, nephropathy, diabetes [MNSI score >2]) in accordance with the taxonomy of the diagnostic criteria documented in the International Association for the Study of Pain (IASP) Classification of Chronic Pain. A neurological disease must be directly correlated with pain, including pain due to spinal root compression.